USER_COMMENT= ANDROID_VERSION=5.0.2 APP_VERSION_NAME=1.1.1 BRAND=samsung PHONE_MODEL=SM-T530NU CUSTOM_DATA= STACK_TRACE=java.lang.RuntimeException: Unable to destroy activity {fr.ifremer.wlo/fr.ifremer.wlo.measurement.MeasurementActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.speech.tts.TextToSpeech.shutdown()' on a null object reference at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4326) at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:4344) at android.app.ActivityThread.access$1500(ActivityThread.java:181) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1530) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:6134) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.speech.tts.TextToSpeech.shutdown()' on a null object reference at fr.ifremer.wlo.measurement.MeasurementActivity.onDestroy(MeasurementActivity.java:474) at android.app.Activity.performDestroy(Activity.java:6608) at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1154) at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4304) ... 10 more java.lang.NullPointerException: Attempt to invoke virtual method 'void android.speech.tts.TextToSpeech.shutdown()' on a null object reference at fr.ifremer.wlo.measurement.MeasurementActivity.onDestroy(MeasurementActivity.java:474) at android.app.Activity.performDestroy(Activity.java:6608) at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1154) at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4304) at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:4344) at android.app.ActivityThread.access$1500(ActivityThread.java:181) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1530) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:6134) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)